| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.397 | 0.296 | 0.731 | 2.228 |
| Arsenic | As (ppm) | 3.287 | 0.691 | 1.167 | 5.884 |
| Calcium | Ca (wt%) | 0.107 | 0.105 | 0.017 | 0.973 |
| Copper | Cu (ppm) | 3.875 | 0.903 | 1.652 | 7.030 |
| Iron | Fe (wt%) | 0.783 | 0.189 | 0.375 | 1.418 |
| Mercury | Hg (ppm) | 0.019 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.071 | 0.032 | 0.031 | 0.378 |
| Manganese | Mn (ppm) | 160.550 | 62.974 | 54.791 | 591.029 |
| Sodium | Na (wt%) | 0.038 | 0.013 | 0.016 | 0.105 |
| Phosphorus | P (wt%) | 0.010 | 0.003 | 0.004 | 0.022 |
| Lead | Pb (ppm) | 9.120 | 2.039 | 3.919 | 20.013 |
| Selenium | Se (ppm) | 0.202 | 0.059 | 0.101 | 0.389 |
| Titanium | Ti (wt%) | 0.189 | 0.026 | 0.134 | 0.289 |
| Zinc | Zn (ppm) | 18.616 | 4.002 | 10.707 | 40.356 |